Exhaust attachment for safety-valves of locomotives



(No Model.) 4 E. LONGSTRETH. Exhaust Attachment for SafetyValves ofLocomotives} No. 233,782. Patented Oct. 26, 1880'.

N-PETERS. PHOYO-UTHOGRAPNER, WASHINGYON. D c.

UNITED STATES PATENT OFFICE.

EDWARD LONGSTRETH, OF PHILADELPHIA, PENNSYLVANIA.

EXHAUST ATTACHMENT FOR SAFETY-VALVES OF LOCOMOTIVES.

SYECIFICATION forming part of Letters Patent No. 233,782, dated October26, 1880.

Application filed September 17, 1880.

To all whom it may concern Beit known that I, EDWARD LONGSTRETH, acitizen of the United States, residing in Philadelphia, Pennsylvania,have invented an In]- provementin Exhaust Attachments for Safety- Valvesof Locomotives, of which the following is a specification.

The object of my invention is to prevent the objectionable noise whichaccompanies the discharge of steam from the safety-valves oflocomotive-engines; and this object I attain by extending a pipe fromthe blow-off branch of the sai'ety-mlve to the exhaust-passage orexhaust-chamber of one of the cylinders, as explained hereinafter.

The view in the accompanying drawing is a vertical section of sufficientof the smoke-box end of a locomotive-boiler to illustrate myimprovement.

A is part of the smoke-box of the boiler; D, one of the cylinders of theengine, and a the exhaust-port, communicating, through theexhaust-passage b, with the exhaust-chamber G, the latter communicating,through the usual exhaust-nozzle, H, with the chimney.

K is the ordinary safety-valve, having a blow-0E branch, m, from which apipe, 20, extends to the exhaust-passage b, so that all the (N0 model.)

steam blown off at the safety-valve will be directed into this passageinstead of being discharged into the air, as usual, the objectionablenoise which accompanies the ordinary escape of steam into the air beingthus prevented.

I am aware that waste steam from the safetyvalve of alocomotive-boilerhas been directed to the smoke-box with the view of preventing theobjectionable noise referred to; but waste steam discharged into anddisseminated throughout the smoke-box necessarily interferes with thedraft; hence this plan is objectionable.

I claim as my invention The combination of the safety-valve andexhaust-passage or exhaust-chamber of a locomotive-engine with a pipe,w, for directing the waste steam blown off from the safety-valve to thesaid passage or chamber, all substantially as described.

In testimony whereofI have signed my name to this specification in thepresence of two sub scribing witnesses.

EDWARD LONGSTRETH.

Witnesses:

JAMES F. ToBIN, HARRY SMITH.

